When you feel yourself getting under a ‘black cloud’. Do this for a minute:
Take both hands and lock them together perpendicular to one another palms facing each other.
Then squeeze and release 5 – 10 times (when releasing hands are about halfway straight). Can be done with left and right hand in either direction.
“You can feel whatever you like. There is nothing to worry about. Your own hands have the best energy to heal”. – Yogi Bhajan